Singapore will be a challenge for both species as you sit essentially on the equator at near sea kevel. I understand that there are a number of Bonsai "Clubs" in Singapore, you would be well served to see if there is somine who rents outside bench space with afternoon protction. I have heard that a number of enthusiasts in Thailand have been buying Japanese Temperate specues and having limited success with them, if any. Let us know what you find out locally.